MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution - Nessus

High Plugin ID: 51587

This page contains detailed information about the MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 51587
Name: MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution
Filename: smb_kb2488013.nasl
Vulnerability Published: 2010-12-08
This Plugin Published: 2011-01-20
Last Modification Time: 2018-11-15
Plugin Version: 1.21
Plugin Type: local
Plugin Family: Windows
Dependencies: microsoft_emet_installed.nasl, smb_hotfixes.nasl, smb_nt_ms10-090.nasl, smb_nt_ms11-003.nasl
Required KB Items [?]: SMB/Missing/MS11-003, SMB/Registry/Enumerated, SMB/WindowsVersion

Vulnerability Information

Severity: High
Vulnerability Published: 2010-12-08
Patch Published: N/A
CVE [?]: CVE-2010-3971
CPE [?]: cpe:/a:microsoft:ie, cpe:/o:microsoft:windows
Exploited by Malware: True

Synopsis

Arbitrary code can be executed on the remote host through a web browser.

Description

The remote host is missing one of the workarounds referenced in KB 2488013.

The remote version of IE reportedly fails to correctly process certain specially crafted Cascading Style Sheets (CSS), which could result in arbitrary code execution on the remote system.

Solution

Apply Microsoft suggested workarounds.

Public Exploits

Target Network Port(s): 139, 445
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Immunity Canvas)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution vulnerability:

Metasploit: exploit/windows/browser/ms11_003_ie_css_import
[MS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free]
Exploit-DB: exploits/windows/dos/15708.html
[EDB-15708: Microsoft Internet Explorer 8 - CSS Parser Denial of Service]
Exploit-DB: exploits/windows/remote/15746.rb
[EDB-15746: Microsoft Internet Explorer 8 - CSS Parser]
Exploit-DB: exploits/windows/remote/16533.rb
[EDB-16533: Microsoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit)]
GitHub: https://github.com/nektra/CVE-2010-3971-hotpatch
[CVE-2010-3971: Do you own security hotfix with Deviare hooking]
Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:M/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	9.3 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.6
CVSS Temporal Score:	8.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.1 (High)

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Plugin Source

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(51587);
  script_version("1.21");
  script_cvs_date("Date: 2018/11/15 20:50:28");

  script_cve_id("CVE-2010-3971");
  script_bugtraq_id(45246);
  script_xref(name:"CERT", value:"634956");
  script_xref(name:"EDB-ID", value:"15708");
  script_xref(name:"EDB-ID", value:"15746");
  script_xref(name:"Secunia", value:"42510");
  script_xref(name:"MSKB", value:"2488013");

  script_name(english:"MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution");
  script_summary(english:"Checks if couple of workarounds referenced in KB 2488013 have been applied.");

  script_set_attribute(attribute:"synopsis", value:
"Arbitrary code can be executed on the remote host through a web
browser.");
  script_set_attribute(attribute:"description", value:
"The remote host is missing one of the workarounds referenced in KB
2488013.

The remote version of IE reportedly fails to correctly process certain
specially crafted Cascading Style Sheets (CSS), which could result in
arbitrary code execution on the remote system.");

  script_set_attribute(attribute:"solution", value:"Apply Microsoft suggested workarounds.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'MS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2010/Dec/110");
  script_set_attribute(attribute:"see_also", value:"http://www.breakingpointsystems.com/community/blog/ie-vulnerability/");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/2488013");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/2488013");

script_set_attribute(attribute:"vuln_publication_date", value:"2010/12/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/01/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:ie");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2011-2018 Tenable Network Security, Inc.");

  script_dependencies("smb_hotfixes.nasl", "microsoft_emet_installed.nasl", "smb_nt_ms10-090.nasl", "smb_nt_ms11-003.nasl");
  script_require_keys("SMB/Registry/Enumerated", "SMB/WindowsVersion", "SMB/Missing/MS11-003");
  script_require_ports(139, 445);

  exit(0);
}

include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("misc_func.inc");
include("audit.inc");

get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit("SMB/Missing/MS11-003");
get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1);
arch = get_kb_item("SMB/ARCH");

version = get_kb_item("SMB/IE/Version");
v = split(version, sep:".", keep:FALSE);
if (int(v[0]) < 6 || int(v[0]) > 8)
 exit(0, "IE version "+ version + " is not known to be affected.");

if (hotfix_check_sp(xp:4, win2003:3, vista:3, win7:1) <= 0)
  exit(0, 'The host is not affected based on its version / service pack.');
if (hotfix_check_server_core() == 1)
  exit(0, "Windows Server Core installs are not affected.");

name    =  kb_smb_name();
port    =  kb_smb_transport();
if (!get_port_state(port)) exit(0, "Port "+port+" is not open.");
login   =  kb_smb_login();
pass    =  kb_smb_password();
domain  =  kb_smb_domain();

if(! smb_session_init()) audit(AUDIT_FN_FAIL, 'smb_session_init');
rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
if (rc != 1)
{
  NetUseDel();
  exit(1, "Can't connect to IPC$ share.");
}
# Connect to remote registry.
hklm = RegConnectRegistry(hkey:HKEY_LOCAL_MACHINE);
if (isnull(hklm))
{
  NetUseDel();
  exit(1, "Can't connect to remote registry.");
}
# Find where it's installed.
path = NULL;
sdb_found      = FALSE;
emet_installed = FALSE;
emet_with_ie   = FALSE;

key = "SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\InstalledSDB\{e4874249-daf0-48c2-a614-f2a51a0a4e01}";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
  value = RegQueryValue(handle:key_h, item:"DatabasePath");
  if (!isnull(value)) path = value[1];
  RegCloseKey(handle:key_h);
}

RegCloseKey(handle:hklm);

# 'Fix it' solution on x64 does not register the path in registry.
if (isnull(path) && !isnull(arch) && arch == "x64")
{
  systemroot = hotfix_get_systemroot();
  path = systemroot + "\AppPatch\Custom\{e4874249-daf0-48c2-a614-f2a51a0a4e01}.sdb";
}

if (!isnull(path))
{
  share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:path);
  sdb =  ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1", string:path);

  NetUseDel(close:FALSE);

  rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
  if (rc != 1)
  {
    NetUseDel();
    exit(1, "Can't connect to "+share+" share.");
  }

  fh = CreateFile(
    file:sdb,
    desired_access:GENERIC_READ,
    file_attributes:FILE_ATTRIBUTE_NORMAL,
    share_mode:FILE_SHARE_READ,
    create_disposition:OPEN_EXISTING
  );
  if (!isnull(fh))
  {
    sdb_found = TRUE;
    CloseFile(handle:fh);
  }
}
NetUseDel();

# Check if EMET is installed

if (!isnull(get_kb_item("SMB/Microsoft/EMET/Installed")))
  emet_installed = TRUE;

# Check if EMET is configured with IE.
# The workaround does not specifically ask to enable DEP
# but if IE is configured with EMET, dep is enabled by default.

emet_list = get_kb_list("SMB/Microsoft/EMET/*");
if(!isnull(emet_list))
{
  foreach entry (keys(emet_list))
  {
    if("iexplore.exe" >< entry && "/dep" >< entry)
    {
      dep = get_kb_item(entry);
      if(!isnull(dep) && dep == 1)
        emet_with_ie = TRUE;
    }
  }
}

if (sdb_found && isnull(get_kb_item("SMB/Missing/MS10-090")))
  exit(0, "'Fix it' solution referenced in KB 2488013 has been applied.");

if (emet_with_ie) exit(0,"Internet Explorer is configured with EMET.");

info = '';

# If both workarounds are not applied, report...
if (!sdb_found && !emet_with_ie)
{
  if (!sdb_found)
   info = '\n' +
     ' - \'Fix it\' solution referenced in KB 2488013 is not applied.\n';

  if (!emet_installed)
    info += ' - Microsoft Enhanced Mitigation Experience Toolkit (EMET) is not installed.\n';
  else
    info += ' - Microsoft Enhanced Mitigation Experience Toolkit (EMET) is installed,\n'+
      'however Internet Explorer is not configured with EMET.\n';
}
# If 'Fix it' solution was applied, but MS10-090 is missing, report...
else if (!emet_with_ie && sdb_found && !isnull(get_kb_item("SMB/Missing/MS10-090")))
{
  info = '\n'+
    ' - \'Fix it\' solution referenced in KB 2488013 has been being applied, however\n'+
    'Microsoft Security Patch (MS10-090) has not been applied.\n';
}

if (info)
{
  report = '\n' +
    'Nessus determined the workaround was not applied based on the following \n'+
    'information : \n'+
    info ;

  if (report_verbosity > 0) security_hole(port:port,extra:report);
  else security_hole(port);
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/smb_kb2488013.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\smb_kb2488013.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/smb_kb2488013.nasl

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How to Run

Here is how to run the MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Windows plugin family.
On the right side table select MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution plugin ID 51587.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl smb_kb2488013.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a smb_kb2488013.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - smb_kb2488013.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state smb_kb2488013.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

45246

MSKB | Microsoft Knowledge Base:

2488013

CERT | Computer Emergency Response Team:

634956

Secunia Advisory:

42510

See also:

Similar and related Nessus plugins:

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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file smb_kb2488013.nasl version 1.21. For more plugins, visit the Nessus Plugin Library.

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MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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